/Engine/Plugins/Editor/EngineAssetDefinitions/Source/Public/AssetDefinition_World.h
Returns the thumbnail info for the specified asset, if it has one. This typically requires loading the asset.
virtual [UThumbnailInfo](API\Runtime\Engine\EditorFramework\UThumbnailInfo) * LoadThumbnailInfo ( const [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) & InAssetData ) const